HVAC School Podcast

Tech Tips – HVAC School For HVAC Techs, By HVAC Techs (Refrigeration as well)

  • Modulation Motors

    Modulation motors are not often seen in residential equipment but are used quite often in commercial and industrial applications on many different types of […]

  • Tech Question – Why Do ECM Motors Trip a GFCI?

    This question was submitted on the site in response to the recent GFCI tip. It’s a good question with several possible answers. What do you think? Hey […]

  • Electric Heat & Blower Interlock

    In residential air handler/fan coils it is common to use a high voltage interlock between the blower and the electric heat strips to ensure that the blower […]

  • Combustion Air

    In order to maintain combustion (burning) you need three things, fuel, heat and oxygen. If you have all three in the proper proportion you can maintain a […]

  • Heat Pump Defrost Sensor vs. Thermostat

    When you work on a heat pump system and you want to test defrost there are many different test procedures to follow to test the board and sensors. Most involve […]